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An example Bayesian network showing a sample conditional probability table (CPT) for the child node (Antigen) based on the possible state combinations of the parent nodes (Age and MDA). With the network in its default state, the probabilities shown in each node represent the evidence in the dataset, i.e., 27.1% of the population were aged >40 years, 79.3% took MDA, and 18.6% were antigen-positive.
